R. Rahmadani and H. D. Hutahaean, “Implementation Of Pohlig-Hellman Algorithm And Steganography Combination Of First Of File (Fof) And End Of File (EOF) For File Security: Implementation Of Pohlig-Hellman Algorithm And Steganography Combination Of First Of File (Fof) And End Of File (EOF) For File Security”, Mantik, vol. 4, no. 1, pp. 14-19, May 2020.